Shower enclosure



FIG. 1 is a front elevational view of the shower enclosure design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof, the right side view is a mirror image of the left side; and,

FIG. 4 is a top view thereof. 

CLAIM The ornamental design for an shower enclosure, as shown and described. 